LSP float text not visible in light mode with high contrast variant
I'm using this theme with neovim 0.8.x from the nightly releases and alacritty as my terminal.
Overall it looks neat, but I have an issue with the LSP completion (I use https://github.com/hrsh7th/nvim-cmp/ for autocompletion) floating list of suggestions which are "invisible" in light mode. Dark mode works well.

My config is as shown on the screenshots above, and I have:
vim.o.termguicolors = true
vim.o.background = 'dark'
in my init.lua (I toggle the background value to light as needed).
Any tips on what might be causing this? I haven't managed to figure out which element in the theme I need to change to fix this, but happy to send a PR if someone can point me in the right direction.
This only happens with solarized-high, the other variants work fine.
https://github.com/hrsh7th/nvim-cmp/blob/433af3dffce64cbd3f99bdac9734768a6cc41951/doc/cmp.txt#L323 These are the highlight groups in nvim-cmp documentation can you play with these and see which works out ?